1 /* $FreeBSD$ */ 2 /*- 3 * Copyright (c) 2008 Hans Petter Selasky. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 #include "opt_ddb.h" 28 29 #include <sys/stdint.h> 30 #include <sys/stddef.h> 31 #include <sys/param.h> 32 #include <sys/queue.h> 33 #include <sys/types.h> 34 #include <sys/systm.h> 35 #include <sys/kernel.h> 36 #include <sys/bus.h> 37 #include <sys/module.h> 38 #include <sys/lock.h> 39 #include <sys/mutex.h> 40 #include <sys/condvar.h> 41 #include <sys/sysctl.h> 42 #include <sys/sx.h> 43 #include <sys/unistd.h> 44 #include <sys/callout.h> 45 #include <sys/malloc.h> 46 #include <sys/priv.h> 47 48 #include <dev/usb/usb.h> 49 #include <dev/usb/usbdi.h> 50 51 #define USB_DEBUG_VAR usb_ctrl_debug 52 53 #include <dev/usb/usb_core.h> 54 #include <dev/usb/usb_debug.h> 55 #include <dev/usb/usb_process.h> 56 #include <dev/usb/usb_busdma.h> 57 #include <dev/usb/usb_dynamic.h> 58 #include <dev/usb/usb_device.h> 59 #include <dev/usb/usb_hub.h> 60 61 #include <dev/usb/usb_controller.h> 62 #include <dev/usb/usb_bus.h> 63 #include <dev/usb/usb_pf.h> 64 #include "usb_if.h" 65 66 /* function prototypes */ 67 68 static device_probe_t usb_probe; 69 static device_attach_t usb_attach; 70 static device_detach_t usb_detach; 71 static device_suspend_t usb_suspend; 72 static device_resume_t usb_resume; 73 static device_shutdown_t usb_shutdown; 74 75 static void usb_attach_sub(device_t, struct usb_bus *); 76 77 /* static variables */ 78 79 #ifdef USB_DEBUG 80 static int usb_ctrl_debug = 0; 81 82 static SYSCTL_NODE(_hw_usb, OID_AUTO, ctrl, CTLFLAG_RW, 0, "USB controller"); 83 SYSCTL_INT(_hw_usb_ctrl, OID_AUTO, debug, CTLFLAG_RW, &usb_ctrl_debug, 0, 84 "Debug level"); 85 #endif 86 87 static int usb_no_boot_wait = 0; 88 TUNABLE_INT("hw.usb.no_boot_wait", &usb_no_boot_wait); 89 SYSCTL_INT(_hw_usb, OID_AUTO, no_boot_wait, CTLFLAG_RDTUN, &usb_no_boot_wait, 0, 90 "No USB device enumerate waiting at boot."); 91 92 static int usb_no_shutdown_wait = 0; 93 TUNABLE_INT("hw.usb.no_shutdown_wait", &usb_no_shutdown_wait); 94 SYSCTL_INT(_hw_usb, OID_AUTO, no_shutdown_wait, CTLFLAG_RW|CTLFLAG_TUN, &usb_no_shutdown_wait, 0, 95 "No USB device waiting at system shutdown."); 96 97 static devclass_t usb_devclass; 98 99 static device_method_t usb_methods[] = { 100 DEVMETHOD(device_probe, usb_probe), 101 DEVMETHOD(device_attach, usb_attach), 102 DEVMETHOD(device_detach, usb_detach), 103 DEVMETHOD(device_suspend, usb_suspend), 104 DEVMETHOD(device_resume, usb_resume), 105 DEVMETHOD(device_shutdown, usb_shutdown), 106 {0, 0} 107 }; 108 109 static driver_t usb_driver = { 110 .name = "usbus", 111 .methods = usb_methods, 112 .size = 0, 113 }; 114 115 /* Host Only Drivers */ 116 DRIVER_MODULE(usbus, ohci, usb_driver, usb_devclass, 0, 0); 117 DRIVER_MODULE(usbus, uhci, usb_driver, usb_devclass, 0, 0); 118 DRIVER_MODULE(usbus, ehci, usb_driver, usb_devclass, 0, 0); 119 DRIVER_MODULE(usbus, xhci, usb_driver, usb_devclass, 0, 0); 120 121 /* Device Only Drivers */ 122 DRIVER_MODULE(usbus, at91_udp, usb_driver, usb_devclass, 0, 0); 123 DRIVER_MODULE(usbus, musbotg, usb_driver, usb_devclass, 0, 0); 124 DRIVER_MODULE(usbus, uss820, usb_driver, usb_devclass, 0, 0); 125 126 /*------------------------------------------------------------------------* 127 * usb_probe 128 * 129 * This function is called from "{ehci,ohci,uhci}_pci_attach()". 130 *------------------------------------------------------------------------*/ 131 static int 132 usb_probe(device_t dev) 133 { 134 DPRINTF("\n"); 135 return (0); 136 } 137 138 static void 139 usb_root_mount_rel(struct usb_bus *bus) 140 { 141 if (bus->bus_roothold != NULL) { 142 DPRINTF("Releasing root mount hold %p\n", bus->bus_roothold); 143 root_mount_rel(bus->bus_roothold); 144 bus->bus_roothold = NULL; 145 } 146 } 147 148 /*------------------------------------------------------------------------* 149 * usb_attach 150 *------------------------------------------------------------------------*/ 151 static int 152 usb_attach(device_t dev) 153 { 154 struct usb_bus *bus = device_get_ivars(dev); 155 156 DPRINTF("\n"); 157 158 if (bus == NULL) { 159 device_printf(dev, "USB device has no ivars\n"); 160 return (ENXIO); 161 } 162 163 if (usb_no_boot_wait == 0) { 164 /* delay vfs_mountroot until the bus is explored */ 165 bus->bus_roothold = root_mount_hold(device_get_nameunit(dev)); 166 } 167 168 usb_attach_sub(dev, bus); 169 170 return (0); /* return success */ 171 } 172 173 /*------------------------------------------------------------------------* 174 * usb_detach 175 *------------------------------------------------------------------------*/ 176 static int 177 usb_detach(device_t dev) 178 { 179 struct usb_bus *bus = device_get_softc(dev); 180 181 DPRINTF("\n"); 182 183 if (bus == NULL) { 184 /* was never setup properly */ 185 return (0); 186 } 187 /* Stop power watchdog */ 188 usb_callout_drain(&bus->power_wdog); 189 190 /* Let the USB explore process detach all devices. */ 191 usb_root_mount_rel(bus); 192 193 USB_BUS_LOCK(bus); 194 195 /* Queue detach job */ 196 usb_proc_msignal(&bus->explore_proc, 197 &bus->detach_msg[0], &bus->detach_msg[1]); 198 199 /* Wait for detach to complete */ 200 usb_proc_mwait(&bus->explore_proc, 201 &bus->detach_msg[0], &bus->detach_msg[1]); 202 203 USB_BUS_UNLOCK(bus); 204 205 /* Get rid of USB callback processes */ 206 207 usb_proc_free(&bus->giant_callback_proc); 208 usb_proc_free(&bus->non_giant_callback_proc); 209 210 /* Get rid of USB explore process */ 211 212 usb_proc_free(&bus->explore_proc); 213 214 /* Get rid of control transfer process */ 215 216 usb_proc_free(&bus->control_xfer_proc); 217 218 #if USB_HAVE_PF 219 usbpf_detach(bus); 220 #endif 221 return (0); 222 } 223 224 /*------------------------------------------------------------------------* 225 * usb_suspend 226 *------------------------------------------------------------------------*/ 227 static int 228 usb_suspend(device_t dev) 229 { 230 struct usb_bus *bus = device_get_softc(dev); 231 232 DPRINTF("\n"); 233 234 if (bus == NULL) { 235 /* was never setup properly */ 236 return (0); 237 } 238 239 USB_BUS_LOCK(bus); 240 usb_proc_msignal(&bus->explore_proc, 241 &bus->suspend_msg[0], &bus->suspend_msg[1]); 242 USB_BUS_UNLOCK(bus); 243 244 return (0); 245 } 246 247 /*------------------------------------------------------------------------* 248 * usb_resume 249 *------------------------------------------------------------------------*/ 250 static int 251 usb_resume(device_t dev) 252 { 253 struct usb_bus *bus = device_get_softc(dev); 254 255 DPRINTF("\n"); 256 257 if (bus == NULL) { 258 /* was never setup properly */ 259 return (0); 260 } 261 262 USB_BUS_LOCK(bus); 263 usb_proc_msignal(&bus->explore_proc, 264 &bus->resume_msg[0], &bus->resume_msg[1]); 265 USB_BUS_UNLOCK(bus); 266 267 return (0); 268 } 269 270 /*------------------------------------------------------------------------* 271 * usb_shutdown 272 *------------------------------------------------------------------------*/ 273 static int 274 usb_shutdown(device_t dev) 275 { 276 struct usb_bus *bus = device_get_softc(dev); 277 278 DPRINTF("\n"); 279 280 if (bus == NULL) { 281 /* was never setup properly */ 282 return (0); 283 } 284 285 device_printf(bus->bdev, "Controller shutdown\n"); 286 287 USB_BUS_LOCK(bus); 288 usb_proc_msignal(&bus->explore_proc, 289 &bus->shutdown_msg[0], &bus->shutdown_msg[1]); 290 if (usb_no_shutdown_wait == 0) { 291 /* wait for shutdown callback to be executed */ 292 usb_proc_mwait(&bus->explore_proc, 293 &bus->shutdown_msg[0], &bus->shutdown_msg[1]); 294 } 295 USB_BUS_UNLOCK(bus); 296 297 device_printf(bus->bdev, "Controller shutdown complete\n"); 298 299 return (0); 300 } 301 302 /*------------------------------------------------------------------------* 303 * usb_bus_explore 304 * 305 * This function is used to explore the device tree from the root. 306 *------------------------------------------------------------------------*/ 307 static void 308 usb_bus_explore(struct usb_proc_msg *pm) 309 { 310 struct usb_bus *bus; 311 struct usb_device *udev; 312 313 bus = ((struct usb_bus_msg *)pm)->bus; 314 udev = bus->devices[USB_ROOT_HUB_ADDR]; 315 316 if (bus->no_explore != 0) 317 return; 318 319 if (udev && udev->hub) { 320 321 if (bus->do_probe) { 322 bus->do_probe = 0; 323 bus->driver_added_refcount++; 324 } 325 if (bus->driver_added_refcount == 0) { 326 /* avoid zero, hence that is memory default */ 327 bus->driver_added_refcount = 1; 328 } 329 330 #ifdef DDB 331 /* 332 * The following three lines of code are only here to 333 * recover from DDB: 334 */ 335 usb_proc_rewakeup(&bus->control_xfer_proc); 336 usb_proc_rewakeup(&bus->giant_callback_proc); 337 usb_proc_rewakeup(&bus->non_giant_callback_proc); 338 #endif 339 340 USB_BUS_UNLOCK(bus); 341 342 #if USB_HAVE_POWERD 343 /* 344 * First update the USB power state! 345 */ 346 usb_bus_powerd(bus); 347 #endif 348 /* Explore the Root USB HUB. */ 349 (udev->hub->explore) (udev); 350 USB_BUS_LOCK(bus); 351 } 352 usb_root_mount_rel(bus); 353 } 354 355 /*------------------------------------------------------------------------* 356 * usb_bus_detach 357 * 358 * This function is used to detach the device tree from the root. 359 *------------------------------------------------------------------------*/ 360 static void 361 usb_bus_detach(struct usb_proc_msg *pm) 362 { 363 struct usb_bus *bus; 364 struct usb_device *udev; 365 device_t dev; 366 367 bus = ((struct usb_bus_msg *)pm)->bus; 368 udev = bus->devices[USB_ROOT_HUB_ADDR]; 369 dev = bus->bdev; 370 /* clear the softc */ 371 device_set_softc(dev, NULL); 372 USB_BUS_UNLOCK(bus); 373 374 /* detach children first */ 375 mtx_lock(&Giant); 376 bus_generic_detach(dev); 377 mtx_unlock(&Giant); 378 379 /* 380 * Free USB device and all subdevices, if any. 381 */ 382 usb_free_device(udev, 0); 383 384 USB_BUS_LOCK(bus); 385 /* clear bdev variable last */ 386 bus->bdev = NULL; 387 } 388 389 /*------------------------------------------------------------------------* 390 * usb_bus_suspend 391 * 392 * This function is used to suspend the USB contoller. 393 *------------------------------------------------------------------------*/ 394 static void 395 usb_bus_suspend(struct usb_proc_msg *pm) 396 { 397 struct usb_bus *bus; 398 struct usb_device *udev; 399 usb_error_t err; 400 401 bus = ((struct usb_bus_msg *)pm)->bus; 402 udev = bus->devices[USB_ROOT_HUB_ADDR]; 403 404 if (udev == NULL || bus->bdev == NULL) 405 return; 406 407 USB_BUS_UNLOCK(bus); 408 409 bus_generic_shutdown(bus->bdev); 410 411 usbd_enum_lock(udev); 412 413 err = usbd_set_config_index(udev, USB_UNCONFIG_INDEX); 414 if (err) 415 device_printf(bus->bdev, "Could not unconfigure root HUB\n"); 416 417 USB_BUS_LOCK(bus); 418 bus->hw_power_state = 0; 419 bus->no_explore = 1; 420 USB_BUS_UNLOCK(bus); 421 422 if (bus->methods->set_hw_power != NULL) 423 (bus->methods->set_hw_power) (bus); 424 425 if (bus->methods->set_hw_power_sleep != NULL) 426 (bus->methods->set_hw_power_sleep) (bus, USB_HW_POWER_SUSPEND); 427 428 usbd_enum_unlock(udev); 429 430 USB_BUS_LOCK(bus); 431 } 432 433 /*------------------------------------------------------------------------* 434 * usb_bus_resume 435 * 436 * This function is used to resume the USB contoller. 437 *------------------------------------------------------------------------*/ 438 static void 439 usb_bus_resume(struct usb_proc_msg *pm) 440 { 441 struct usb_bus *bus; 442 struct usb_device *udev; 443 usb_error_t err; 444 445 bus = ((struct usb_bus_msg *)pm)->bus; 446 udev = bus->devices[USB_ROOT_HUB_ADDR]; 447 448 if (udev == NULL || bus->bdev == NULL) 449 return; 450 451 USB_BUS_UNLOCK(bus); 452 453 usbd_enum_lock(udev); 454 #if 0 455 DEVMETHOD(usb_take_controller, NULL); /* dummy */ 456 #endif 457 USB_TAKE_CONTROLLER(device_get_parent(bus->bdev)); 458 459 USB_BUS_LOCK(bus); 460 bus->hw_power_state = 461 USB_HW_POWER_CONTROL | 462 USB_HW_POWER_BULK | 463 USB_HW_POWER_INTERRUPT | 464 USB_HW_POWER_ISOC | 465 USB_HW_POWER_NON_ROOT_HUB; 466 bus->no_explore = 0; 467 USB_BUS_UNLOCK(bus); 468 469 if (bus->methods->set_hw_power_sleep != NULL) 470 (bus->methods->set_hw_power_sleep) (bus, USB_HW_POWER_RESUME); 471 472 if (bus->methods->set_hw_power != NULL) 473 (bus->methods->set_hw_power) (bus); 474 475 err = usbd_set_config_index(udev, 0); 476 if (err) 477 device_printf(bus->bdev, "Could not configure root HUB\n"); 478 479 usbd_enum_unlock(udev); 480 481 USB_BUS_LOCK(bus); 482 } 483 484 /*------------------------------------------------------------------------* 485 * usb_bus_shutdown 486 * 487 * This function is used to shutdown the USB contoller. 488 *------------------------------------------------------------------------*/ 489 static void 490 usb_bus_shutdown(struct usb_proc_msg *pm) 491 { 492 struct usb_bus *bus; 493 struct usb_device *udev; 494 usb_error_t err; 495 496 bus = ((struct usb_bus_msg *)pm)->bus; 497 udev = bus->devices[USB_ROOT_HUB_ADDR]; 498 499 if (udev == NULL || bus->bdev == NULL) 500 return; 501 502 USB_BUS_UNLOCK(bus); 503 504 bus_generic_shutdown(bus->bdev); 505 506 usbd_enum_lock(udev); 507 508 err = usbd_set_config_index(udev, USB_UNCONFIG_INDEX); 509 if (err) 510 device_printf(bus->bdev, "Could not unconfigure root HUB\n"); 511 512 USB_BUS_LOCK(bus); 513 bus->hw_power_state = 0; 514 bus->no_explore = 1; 515 USB_BUS_UNLOCK(bus); 516 517 if (bus->methods->set_hw_power != NULL) 518 (bus->methods->set_hw_power) (bus); 519 520 if (bus->methods->set_hw_power_sleep != NULL) 521 (bus->methods->set_hw_power_sleep) (bus, USB_HW_POWER_SHUTDOWN); 522 523 usbd_enum_unlock(udev); 524 525 USB_BUS_LOCK(bus); 526 } 527 528 static void 529 usb_power_wdog(void *arg) 530 { 531 struct usb_bus *bus = arg; 532 533 USB_BUS_LOCK_ASSERT(bus, MA_OWNED); 534 535 usb_callout_reset(&bus->power_wdog, 536 4 * hz, usb_power_wdog, arg); 537 538 #ifdef DDB 539 /* 540 * The following line of code is only here to recover from 541 * DDB: 542 */ 543 usb_proc_rewakeup(&bus->explore_proc); /* recover from DDB */ 544 #endif 545 546 #if USB_HAVE_POWERD 547 USB_BUS_UNLOCK(bus); 548 549 usb_bus_power_update(bus); 550 551 USB_BUS_LOCK(bus); 552 #endif 553 } 554 555 /*------------------------------------------------------------------------* 556 * usb_bus_attach 557 * 558 * This function attaches USB in context of the explore thread. 559 *------------------------------------------------------------------------*/ 560 static void 561 usb_bus_attach(struct usb_proc_msg *pm) 562 { 563 struct usb_bus *bus; 564 struct usb_device *child; 565 device_t dev; 566 usb_error_t err; 567 enum usb_dev_speed speed; 568 569 bus = ((struct usb_bus_msg *)pm)->bus; 570 dev = bus->bdev; 571 572 DPRINTF("\n"); 573 574 switch (bus->usbrev) { 575 case USB_REV_1_0: 576 speed = USB_SPEED_FULL; 577 device_printf(bus->bdev, "12Mbps Full Speed USB v1.0\n"); 578 break; 579 580 case USB_REV_1_1: 581 speed = USB_SPEED_FULL; 582 device_printf(bus->bdev, "12Mbps Full Speed USB v1.1\n"); 583 break; 584 585 case USB_REV_2_0: 586 speed = USB_SPEED_HIGH; 587 device_printf(bus->bdev, "480Mbps High Speed USB v2.0\n"); 588 break; 589 590 case USB_REV_2_5: 591 speed = USB_SPEED_VARIABLE; 592 device_printf(bus->bdev, "480Mbps Wireless USB v2.5\n"); 593 break; 594 595 case USB_REV_3_0: 596 speed = USB_SPEED_SUPER; 597 device_printf(bus->bdev, "5.0Gbps Super Speed USB v3.0\n"); 598 break; 599 600 default: 601 device_printf(bus->bdev, "Unsupported USB revision\n"); 602 usb_root_mount_rel(bus); 603 return; 604 } 605 606 /* default power_mask value */ 607 bus->hw_power_state = 608 USB_HW_POWER_CONTROL | 609 USB_HW_POWER_BULK | 610 USB_HW_POWER_INTERRUPT | 611 USB_HW_POWER_ISOC | 612 USB_HW_POWER_NON_ROOT_HUB; 613 614 USB_BUS_UNLOCK(bus); 615 616 /* make sure power is set at least once */ 617 618 if (bus->methods->set_hw_power != NULL) { 619 (bus->methods->set_hw_power) (bus); 620 } 621 622 /* allocate the Root USB device */ 623 624 child = usb_alloc_device(bus->bdev, bus, NULL, 0, 0, 1, 625 speed, USB_MODE_HOST); 626 if (child) { 627 err = usb_probe_and_attach(child, 628 USB_IFACE_INDEX_ANY); 629 if (!err) { 630 if ((bus->devices[USB_ROOT_HUB_ADDR] == NULL) || 631 (bus->devices[USB_ROOT_HUB_ADDR]->hub == NULL)) { 632 err = USB_ERR_NO_ROOT_HUB; 633 } 634 } 635 } else { 636 err = USB_ERR_NOMEM; 637 } 638 639 USB_BUS_LOCK(bus); 640 641 if (err) { 642 device_printf(bus->bdev, "Root HUB problem, error=%s\n", 643 usbd_errstr(err)); 644 usb_root_mount_rel(bus); 645 } 646 647 /* set softc - we are ready */ 648 device_set_softc(dev, bus); 649 650 /* start watchdog */ 651 usb_power_wdog(bus); 652 } 653 654 /*------------------------------------------------------------------------* 655 * usb_attach_sub 656 * 657 * This function creates a thread which runs the USB attach code. 658 *------------------------------------------------------------------------*/ 659 static void 660 usb_attach_sub(device_t dev, struct usb_bus *bus) 661 { 662 const char *pname = device_get_nameunit(dev); 663 664 mtx_lock(&Giant); 665 if (usb_devclass_ptr == NULL) 666 usb_devclass_ptr = devclass_find("usbus"); 667 mtx_unlock(&Giant); 668 669 #if USB_HAVE_PF 670 usbpf_attach(bus); 671 #endif 672 /* Initialise USB process messages */ 673 bus->explore_msg[0].hdr.pm_callback = &usb_bus_explore; 674 bus->explore_msg[0].bus = bus; 675 bus->explore_msg[1].hdr.pm_callback = &usb_bus_explore; 676 bus->explore_msg[1].bus = bus; 677 678 bus->detach_msg[0].hdr.pm_callback = &usb_bus_detach; 679 bus->detach_msg[0].bus = bus; 680 bus->detach_msg[1].hdr.pm_callback = &usb_bus_detach; 681 bus->detach_msg[1].bus = bus; 682 683 bus->attach_msg[0].hdr.pm_callback = &usb_bus_attach; 684 bus->attach_msg[0].bus = bus; 685 bus->attach_msg[1].hdr.pm_callback = &usb_bus_attach; 686 bus->attach_msg[1].bus = bus; 687 688 bus->suspend_msg[0].hdr.pm_callback = &usb_bus_suspend; 689 bus->suspend_msg[0].bus = bus; 690 bus->suspend_msg[1].hdr.pm_callback = &usb_bus_suspend; 691 bus->suspend_msg[1].bus = bus; 692 693 bus->resume_msg[0].hdr.pm_callback = &usb_bus_resume; 694 bus->resume_msg[0].bus = bus; 695 bus->resume_msg[1].hdr.pm_callback = &usb_bus_resume; 696 bus->resume_msg[1].bus = bus; 697 698 bus->shutdown_msg[0].hdr.pm_callback = &usb_bus_shutdown; 699 bus->shutdown_msg[0].bus = bus; 700 bus->shutdown_msg[1].hdr.pm_callback = &usb_bus_shutdown; 701 bus->shutdown_msg[1].bus = bus; 702 703 /* Create USB explore and callback processes */ 704 705 if (usb_proc_create(&bus->giant_callback_proc, 706 &bus->bus_mtx, pname, USB_PRI_MED)) { 707 device_printf(dev, "WARNING: Creation of USB Giant " 708 "callback process failed.\n"); 709 } else if (usb_proc_create(&bus->non_giant_callback_proc, 710 &bus->bus_mtx, pname, USB_PRI_HIGH)) { 711 device_printf(dev, "WARNING: Creation of USB non-Giant " 712 "callback process failed.\n"); 713 } else if (usb_proc_create(&bus->explore_proc, 714 &bus->bus_mtx, pname, USB_PRI_MED)) { 715 device_printf(dev, "WARNING: Creation of USB explore " 716 "process failed.\n"); 717 } else if (usb_proc_create(&bus->control_xfer_proc, 718 &bus->bus_mtx, pname, USB_PRI_MED)) { 719 device_printf(dev, "WARNING: Creation of USB control transfer " 720 "process failed.\n"); 721 } else { 722 /* Get final attach going */ 723 USB_BUS_LOCK(bus); 724 usb_proc_msignal(&bus->explore_proc, 725 &bus->attach_msg[0], &bus->attach_msg[1]); 726 USB_BUS_UNLOCK(bus); 727 728 /* Do initial explore */ 729 usb_needs_explore(bus, 1); 730 } 731 } 732 733 SYSUNINIT(usb_bus_unload, SI_SUB_KLD, SI_ORDER_ANY, usb_bus_unload, NULL); 734 735 /*------------------------------------------------------------------------* 736 * usb_bus_mem_flush_all_cb 737 *------------------------------------------------------------------------*/ 738 #if USB_HAVE_BUSDMA 739 static void 740 usb_bus_mem_flush_all_cb(struct usb_bus *bus, struct usb_page_cache *pc, 741 struct usb_page *pg, usb_size_t size, usb_size_t align) 742 { 743 usb_pc_cpu_flush(pc); 744 } 745 #endif 746 747 /*------------------------------------------------------------------------* 748 * usb_bus_mem_flush_all - factored out code 749 *------------------------------------------------------------------------*/ 750 #if USB_HAVE_BUSDMA 751 void 752 usb_bus_mem_flush_all(struct usb_bus *bus, usb_bus_mem_cb_t *cb) 753 { 754 if (cb) { 755 cb(bus, &usb_bus_mem_flush_all_cb); 756 } 757 } 758 #endif 759 760 /*------------------------------------------------------------------------* 761 * usb_bus_mem_alloc_all_cb 762 *------------------------------------------------------------------------*/ 763 #if USB_HAVE_BUSDMA 764 static void 765 usb_bus_mem_alloc_all_cb(struct usb_bus *bus, struct usb_page_cache *pc, 766 struct usb_page *pg, usb_size_t size, usb_size_t align) 767 { 768 /* need to initialize the page cache */ 769 pc->tag_parent = bus->dma_parent_tag; 770 771 if (usb_pc_alloc_mem(pc, pg, size, align)) { 772 bus->alloc_failed = 1; 773 } 774 } 775 #endif 776 777 /*------------------------------------------------------------------------* 778 * usb_bus_mem_alloc_all - factored out code 779 * 780 * Returns: 781 * 0: Success 782 * Else: Failure 783 *------------------------------------------------------------------------*/ 784 uint8_t 785 usb_bus_mem_alloc_all(struct usb_bus *bus, bus_dma_tag_t dmat, 786 usb_bus_mem_cb_t *cb) 787 { 788 bus->alloc_failed = 0; 789 790 mtx_init(&bus->bus_mtx, device_get_nameunit(bus->parent), 791 NULL, MTX_DEF | MTX_RECURSE); 792 793 usb_callout_init_mtx(&bus->power_wdog, 794 &bus->bus_mtx, 0); 795 796 TAILQ_INIT(&bus->intr_q.head); 797 798 #if USB_HAVE_BUSDMA 799 usb_dma_tag_setup(bus->dma_parent_tag, bus->dma_tags, 800 dmat, &bus->bus_mtx, NULL, 32, USB_BUS_DMA_TAG_MAX); 801 #endif 802 if ((bus->devices_max > USB_MAX_DEVICES) || 803 (bus->devices_max < USB_MIN_DEVICES) || 804 (bus->devices == NULL)) { 805 DPRINTFN(0, "Devices field has not been " 806 "initialised properly\n"); 807 bus->alloc_failed = 1; /* failure */ 808 } 809 #if USB_HAVE_BUSDMA 810 if (cb) { 811 cb(bus, &usb_bus_mem_alloc_all_cb); 812 } 813 #endif 814 if (bus->alloc_failed) { 815 usb_bus_mem_free_all(bus, cb); 816 } 817 return (bus->alloc_failed); 818 } 819 820 /*------------------------------------------------------------------------* 821 * usb_bus_mem_free_all_cb 822 *------------------------------------------------------------------------*/ 823 #if USB_HAVE_BUSDMA 824 static void 825 usb_bus_mem_free_all_cb(struct usb_bus *bus, struct usb_page_cache *pc, 826 struct usb_page *pg, usb_size_t size, usb_size_t align) 827 { 828 usb_pc_free_mem(pc); 829 } 830 #endif 831 832 /*------------------------------------------------------------------------* 833 * usb_bus_mem_free_all - factored out code 834 *------------------------------------------------------------------------*/ 835 void 836 usb_bus_mem_free_all(struct usb_bus *bus, usb_bus_mem_cb_t *cb) 837 { 838 #if USB_HAVE_BUSDMA 839 if (cb) { 840 cb(bus, &usb_bus_mem_free_all_cb); 841 } 842 usb_dma_tag_unsetup(bus->dma_parent_tag); 843 #endif 844 845 mtx_destroy(&bus->bus_mtx); 846 } 847